On Mon, 25 Sep 2006 21:35:56 EDT, Joyce Niblack <[log in to unmask]> wrote:

>Is there anything we can do to stop this?

At the list level, you can add to your Filter list

Filter= also,  x@y, a@c, c@d, ...
Filter= m@n, ..., *@MEGAWEBSERVERS.COM.  

This will prevent LISTSERV from processing any commands from this address,
which will prevent thsi address from subscribing.  However, you probably will
still get a notification from LISTSERV that "a command has been received from
a user that is served off".  This can be just as annoying, but since it
includes the address (or at least the domain) in the Subject: line, you can
reliably filter such messages in your own mail client.

As to the Server Admin doing this:

 quiet serve [log in to unmask] off drop

it has been done.